Did You Know...
...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 8163965 | Continuous crystallisation process of iodinated phenyl derivatives The invention describes a process for the purification of iodinated aryl compounds where the purification is performed by continuous crystallization of a crude product in a solvent with removal of at least a fraction of the solvent. The continuous crystallization pr... | 04/24/2012 |
| 8034986 | Processing of solid brominated aromatic organic compounds containing occluded bromine Solid-state highly brominated compounds such as solid brominated flame retardants with bromine contents of at least about 60 wt % often contain occluded bromine. Because of their high bromine contents, such compounds have relatively low solubility in common organic ... | 10/11/2011 |
| 7311807 | Process for the separation of mixtures containing m-and p-dichlorobenzene A process for the separation of dichlorobenzene mixtures containing m- and p-dichlorobenzene in which: (i) the mixture is as an extracting agent contacted with a phosphoric ester of the general formula (I) as an extracting agent | 12/25/2007 |
| 7268211 | Removal of ruthenium by-product by supercritical fluid processing A process for removing ruthenium or ruthenium-containing compounds from a reaction mixture comprising a compound of the following formula I in an organic solvent using supercritical fluid processing techniques: w... | 09/11/2007 |
| 7255927 | Laminate composition This invention concerns a thermosetting resin system that is useful in the manufacture of high performance prepreg, laminate and composite materials as well as, prepregs, laminates and composites made from the thermosetting resin composition. ... | 08/14/2007 |
| 7091389 | Method for producing aromatic compound isomers In a process of producing an aromatic compound isomer substituted with alkyl group(s) and/or halogen atom(s), through adsorptive separation by the use of a zeolite-containing adsorbent and a desorbent, the desorbent is, after having been processed for removing impur... | 08/15/2006 |
| 6958423 | Bromination process This invention relates to a novel process which comprises feeding a mixture formed from diphenylethane and bromine to a stirrable reaction mass comprised of bromine and a bromination catalyst to yield a decabromodiphenylethane wet cake which can be most economically... | 10/25/2005 |
| 6841707 | Method and apparatus for producing decabromodiphenyl alkanes A method of producing decabromodiphenyl alkanes includes the steps of charging a reaction vessel with bromine and a bromination catalyst and introducing a diphenyl alkane into the vessel at a location above the level of the charge bromine and catalyst. A dip tube ap... | 01/11/2005 |
| 6720431 | Methods and apparatus for separating and detecting specific polyhalogenated diaromatic hydrocarbons Sample processing methods that utilize a graphitised carbon matrix are useful for determining the relative amounts polyhalogenated biphenyls (PHBs), polyhalogenated dibenzofurans (PHDFs), and polyhalogenated dibenzo-p-dioxins (PHDDs) in a mixture of polyhalogenated ... | 04/13/2004 |
| 6511604 | Method of treating a liquid material and treatment facilities The present invention relates to the techniques of treating a liquid material to be treated, which enables efficient fractional removal of toxic materials such as PCB in a liquid mixture. The treatment method of the invention comprises the step of permitt... | 01/28/2003 |
| 6284934 | Reducing meta content of isomeric mixtures of halo substituted alkylbenzenes Disclosed is a method of separating the meta isomer of a haloalkylbenzene having the general formula ##STR1## from a mixture with at least one other isomer, where X is Cl or Br and R is alkyl from C2 to C12 or cycloalkyl from C3... | 09/04/2001 |
| 6262322 | Adsorbent for aromatic isomers and production of aromatic isomers An adsorbent which comprises a zeolite containing Cs and/or Rb, said zeolite being characterized by that the ratio of [the number of moles of Cs and/or R in the zeolite] to [the number of moles of Al in the zeolite] is 0.1 or less. This adsorbent permits ... | 07/17/2001 |
| 6235952 | Method for isomerizing halogenated ethylbenzene and method for separating halogenated ethylbenzene isomers A method for isomerizing a halogenated ethylbenzene characterized by bringing the same into contact with an acidic zeolite containing at least one metal selected among metals of Groups 7 to 11; and a method of efficiently isolating a m-halogenated ethylbe... | 05/22/2001 |
| 6222079 | Method of increasing certain isomeric ratios in chlorinating substituted benzenes Disclosed is a method of increasing the percentage of certain isomers made when di or tri-substituted benzenes are chlorinated in the presence of a Friedel-Crafts catalyst. The use of about 0.001 to about 1 wt % a cocatalyst during chlorination alters the... | 04/24/2001 |
| 6201161 | Method of reducing benzaldehyde or benzotrihalide content in a mixture Disclosed is a method of removing about 0.05 to about 20 mole % of a benzaldehyde or benzotrihalide from a mixture with a liquid compound that boils within about -10 to about &#b1;5° C. of the boiling point of the benzaldehyde or benzotrihalide. To the m... | 03/13/2001 |
| 6156945 | Method of making high purity 2,4- and 3,4-dichlorotoluene Disclosed is a method of making high purity 2,4- and 3,4-dichlorotoluene from parachlorotoluene that contains some metachlorotoluene. About 0.0001 to about 5 wt % of a Friedel-Crafts catalyst and about 0.5 to about 10 equivalents of a brominating agent ar... | 12/05/2000 |
| 6130361 | Reducing meta content of isomeric mixtures of halo substituted toluenes Disclosed is a method of separating the meta isomer of a halotoluene having the general formula ##STR1## from a mixture with at least one other isomer, where X is Cl or Br. About 0.0001 to about 5 wt % of a Friedel-Crafts catalyst is added to the ... | 10/10/2000 |
| 5948212 | Titanium separation process A process for the separation of a mixture of a titanium tetrahalide, a reaction diluent of an intermediate boiling point and at least one of a titanium alkoxide, ester or complex thereof without the aid of a distinct separation solvent by subjecting the m... | 09/07/1999 |
| 5874659 | Process for the preparation of p-bromotoluene A crude bromotoluene mixture comprising at least 70 wt % of a mixture of p-bromotoluene and o-bromotoluene, and wherein the weight ratio of p-bromotoluene:o-bromotoluene is in the range of 50:50 to 99:1 is cooled to a temperature at which crystals of prod... | 02/23/1999 |
| 5744669 | Process for the conversion of a halogenated organic stream containing trace quantities of organic nitrates A process for the conversion of a halogenated organic stream containing trace quantities of organic nitrates to produce a stream comprising hydrogenated hydrocarbonaceous compounds free from organic nitrates and halogenated organic compounds by means of c... | 04/28/1998 |
| 5600041 | Process for the selective removal of organic nitrates from a halogenated organic stream containing trace quantities of organic nitrates A process for treating a stream containing halogenated organic compounds and having trace quantities of organic nitrates to produce a stream comprising halogenated organic compounds free from organic nitrates by the utilization of a hydrogenation zone ope... | 02/04/1997 |
| 5457248 | Brominated diphenylalkane products and processes Described are processes for preparing brominated diphenylalkane products which are far whiter than prior known brominated diphenylalkane products. The resultant white brominated diphenylalkane products also form a part of the present invention, as do form... | 10/10/1995 |
| 5436377 | Process for isolating M-dichlorobenzene from mixtures of dichlorobenzene isomers In a particularly advantageous process for isolating m-dichlorobenzene from mixtures of dichlorobenzene isomers by crystallization as eutectic crystals using a processing aid, the processing aid used is a compound of the formula (I) ##STR1## in ... | 07/25/1995 |
| 5401890 | Process and apparatus for heat treating halogenated compounds This invention relates to an improved process and apparatus for preparing a product predominant in decabromodiphenylethane, the process comprising heat treating the product in a product treating and storage system for a period of time and at a temperature... | 03/28/1995 |
| 5386067 | Process for separating mixtures of m- and p-dichlorobenzene Mixtures of m- and p-dichlorobenzene can be separated by treating such mixtures in the liquid phase with a pentasil zeolite at from 20° to 250° C., a filtrate enriched in m-dichlorobenzene being removed and the p-dichlorobenzene being obtained by desorp... | 01/31/1995 |
| 5382725 | Process for the purification of 1,3-dihalobenzene from an isomeric mixture of dihalobenzenes 1,3-dihalobenzene, particularly 1,3-dichlorobenzene, is produced in high efficiency from a mixture containing the subject compound and its corresponding 1,4-isomer by a special process in which the dihalobenzene mixture is treated with polyethylene glycol... | 01/17/1995 |
| 5367104 | Process for the purification of organic compounds contaminated by dissolved metal compounds Process for the purification of organic compounds contaminated by dissolved metal compounds. The present invention relates to a process for the purification of organic compounds contaminated by dissolved metal compounds, by bringing the contaminated organ... | 11/22/1994 |
| 5324874 | Process for a decarbromodiphenylethane predominate product having enhanced whiteness This invention relates to an improvement in a process for preparing a product predominant in decabromodiphenylethane. In the improved process the diphenylethane is reacted with bromine in the presence of bromination catalyst in a reaction vessel by feedin... | 06/28/1994 |
| 5288929 | Method for removing, condensing and collecting propellants from foam materials A method for removing, condensing and collecting propellants, e.g. chlorofluoro-carbons (CFCs) in an environmentally friendly manner from foam materials, e.g. insulant materials from old (discarded) refrigerators, district heating tubes and other material... | 02/22/1994 |
| 5273627 | Process for stripping and distilling mixtures containing alkylaromatics chlorinated in the side chain Mixtures containing alkylaromatrics chlorinated in the side chain are worked up by blowing them out with an inert gas before distillation at elevated temperature and carrying out the distillation in the presence of amines and/or chlorinated amines.... | 12/28/1993 |
| 5242549 | Distillation separation process of titanium tetrachloride and halohydrocarbon An improved process for separation of valuable components of a waste stream resulting from production of an olefin polymerization procatalyst by the addition to the waste stream of a separation solvent of intermediate boiling point, subjecting the resulti... | 09/07/1993 |
| 5198121 | Drying of hydrocarbon/hydrochloric acid/water admixtures Water-containing mixtures of at least one hydrocarbon/halocarbon and hydrochloric acid, e.g., the methyl chloride feedstream in conventional process for the synthesis of chloromethanes, are desiccated by intimately contacting such mixtures with an effecti... | 03/30/1993 |
| 5181992 | Separation of isomers, e. g., phenethyl bromide from 1-phenyl-1-bromoethane Mixtures of isomers, e.g., mixtures of phenethyl bromide and 1-phenyl-1-bromoethane, are separated by (a) selectively condensing one such isomer with an aromatic compound bearing at least one aryl (nuclear) hydrogen atom, e.g., xylene, in the presence of ... | 01/26/1993 |
| 5177302 | Process for separating isomers of disubstituted benzenes and agents to be used therefor This invention is concerned with a process for separating isomers of disubstituted benzenes, wherein a mixture of isomers of disubstituted benzenes is contacted with a substituted cyclodextrin to form inclusion complexes, and desired isomers are recovered... | 01/05/1993 |
| 5175381 | Process for recovering halogenated hydrocarbons from synthetic foams A method for recovering halogenated hydrocarbons (FCH) from synthetic foams wherein halogenated hydrocarbons (FCH) are released from synthetic foam in a hermetically sealed processing chamber and transferred to a gaseous carrier medium of steam. The steam... | 12/29/1992 |
| 5152875 | Separation of m- and p-dichlorobenzene A process for separating m- and p-dichlorobenzene by extractive rectification with an extractant and removal of this extractant. Using as extractant an alkylene carbonate of the formula ##STR1## where R1, R2, R3 and R... | 10/06/1992 |
| 5143685 | Process for purification of ortho-chlorotoluene A process for separating the ortho-isomer of chlorotoluene from a feed mixture containing ortho- and para-chlorotoluene by selective adsorption and desorption with an L zeolite adsorbent having potassium or potassium and sodium cations at cation exchange ... | 09/01/1992 |
| 5132474 | Method of recovering hydrocarbon halide The present invention provides a method of effectively recovering a hydrocarbon halide and the use of a specific aprotic polar compound for said method. Thus, the present invention provides a method of recovering a hydrocarbon halide comprising absorbing ... | 07/21/1992 |
| 5126498 | Process for the separation of isomeric dichlorotoluenes The process for the separation of isomeric dichlorotoluenes, comprising the steps of: (a) passing a mixture containing isomeric dichlorotoluenes over a zeolite of the ZSM5 type having the composition (expressed in molar ratios) of (0.9+0.2) M2/... | 06/30/1992 |
| 5043496 | Process for the treatment of heavy chlorination residues The present invention relates to a process for the treatment of heavy residues produced in the manufacture of chlorinated products, in which process a chemical compound chosen from certain fatty compounds is added to the heavy residues in order to form fl... | 08/27/1991 |
